Kashif, What PLCs are these? Also, what software is running on the Integrator (Modbus MG30, Modbus DI30, custom image, etc...)? I/O scan is a little high - Foxboro has recommended a maximum of 75%. Are you getting any control overruns? Regards, Kevin FitzGerrell On Sat, Mar 8, 2008 at 7:14 PM, Kashif Ijaz <kashifijaz93@xxxxxxxxxxx> wrote: > Dear All > > Our I/A version 7.1.1 has one Integrator 30 (P0961BD-0E) connected to two > PLCs through one RS232/485 converter. The host for the station is AW51F (P79). > > We are losing communication almost every day and we normalise by hard > resetting the Integrator 30. > > I have changed almost every hardware in the chain eg > > Integrator > Selector switch board > peripheral cable > Serial converter 232/485 > > Also have checked field serial cables and connections. All are ok but still > the communication is hanging. Following is the message coming on the smon_log > file > > 2008-03-07 04:46:21 22MG54 Equip = 22MG54 SYSMON -00043 Equipment failed > > The station details are > > Soft vers v6.1.6 > Idle time 88.9% > I/O scan 78.7 > Cont Blks 2.4 > Seq Blks 2.9 > Total control Cycle 10.0 > OM scan 0.8 > Station free memory 805152 Bytes > > Can anyone suggest troubleshooting tips. > > Regards, > > Kashif Ijaz > INTECH Process Automation > _________________________________________________________________ > Express yourself instantly with MSN Messenger! Download today it's FREE! > http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/ > > > _______________________________________________________________________ > This mailing list is neither sponsored nor endorsed by Invensys Process > Systems (formerly The Foxboro Company). Use the info you obtain here at > your own risks. Read http://www.thecassandraproject.org/disclaimer.html > > foxboro mailing list: //www.freelists.org/list/foxboro > to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join > to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave > > _______________________________________________________________________ This mailing list is neither sponsored nor endorsed by Invensys Process Systems (formerly The Foxboro Company). Use the info you obtain here at your own risks. Read http://www.thecassandraproject.org/disclaimer.html foxboro mailing list: //www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave